Food Materials Lab Report

Summative Criteria B & C (Design an experiment to compare the amount of energy present between 5 food materials.)

Name: Sanchita Sannigrahi Class: 9-A

Biology Lab Report

• Research Question: How do different types of nuts/ pulses vary in their energy content?

• Hypothesis: If the change in temperature is greater when the water is heated with the use of the fire caught by the food substance, then the energy content in the food substance is higher because the heat energy is greater, since the heat energy is absorbed by the water when the fire is kept under the test tube containing water. The formula indicates that if the change in temperature

- As we vary the food items that we use, their heat energy/ they themselves become the independent variable.

 Dependent variable: Temperature change in the water/Amount of energy absorbed. - The change in temperature/ Heat energy absorbed is varied as the heat energy of the substance is varied.

 Controlled variable: Amount of water, Temperature of surroundings, Type of needle used, Temperature of water, the food is burnt until it can’t burn anymore. - The temperature is not varied in any case or does not depend on anything during this experiment, amount of water equals 20ml in each trial of experiment for each food substance.

• Apparatus/Materials:

Apparatus Materials

1. Test Tube

2. Measuring Cylinder

3. Laboratory

It contains about 1.556 kJ/g of Average Energy. Peanut contains the highest amount of energy in the 5 items used during the experiment possessing energy of approximately 5.885kJ/g.

The trials of the walnut show a larger temperature change than peanut but the energy content in peanut is more than that of walnut which is in the 4th position. Kidney beans (Rajma) had the least mass out of all, thus its energy content is least as well. Almond as well as has a large temperature change and thus is the second highest in the graph for its energy content being 4.739kJ/g. According to me the graph does not follow any trend or show any relationship or a pattern.

• Conclusion: The result of my investigation does not support the hypothesis. As more or larger the temperature change is, the lesser the energy content the food substance has. This maybe be due to in equal amount or mass of the food substances in the experiment used. This was one of the reasons why the experiment wasn’t a fair test. The only good substance that proves my hypothesis right is Kidney beans, cashew and Almond others don’t. According to other researches it says, (“Energy content in the food substance is higher because the heat energy is greater, since the heat energy is absorbed by the water when the fire is kept under the test tube containing water. The formula indicates that if the change in